formal

State prosecutors said they planned to file formal charges against Robinson on Tuesday.

For now, Mr Robinson remains in custody as prosecutors prepare formal charges.

He added that Gulf nations, especially Saudi Arabia, have been pushing for more formal — and well-defined — defense pacts, but that the relationship with the U.S. needed to reflect recent changes.

However, it had never been subject to any formal inspections until this year, as no body had the power to do so.

A state visit is a formal trip to the UK by the head of a country.